vidya ivdya vdiya dviya idvya divya viyda ivyda vyida yvida iyvda yivda vdyia dvyia vydia yvdia dyvia ydvia idyva diyva iydva yidva dyiva ydiva viday ivday vdiay dviay idvay divay viady ivady vaidy avidy iavdy aivdy vdaiy dvaiy vadiy avdiy daviy adviy idavy diavy iadvy aidvy daivy adivy viyad ivyad vyiad yviad iyvad yivad viayd ivayd vaiyd aviyd iavyd aivyd vyaid yvaid vayid avyid yavid ayvid iyavd yiavd iayvd aiyvd yaivd ayivd vdyai dvyai vydai yvdai dyvai ydvai vdayi dvayi vadyi avdyi davyi advyi vyadi yvadi vaydi avydi yavdi ayvdi dyavi ydavi dayvi adyvi yadvi aydvi idyav diyav iydav yidav dyiav ydiav idayv diayv iadyv aidyv daiyv adiyv iyadv yiadv iaydv aiydv yaidv ayidv dyaiv ydaiv dayiv adyiv yadiv aydiv
Note: these 'words' (valid or invalid) are all the permutations of the word vidya. These words are obtained by scrambling the letters in vidya.